small fixes in portal clones and Terminal B

Assets/Portal/Runtime/Portal.cs

@@ -7,7 +7,6 @@ using UnityEngine;
 
 namespace EscapeRoomEngine.Portal.Runtime
 {
-    [RequireComponent(typeof(Collider))]
     public class Portal : DoorState
     {
         public static readonly Matrix4x4 HalfRotation = Matrix4x4.Rotate(Quaternion.Euler(0, 180, 0));
@@ -31,9 +30,6 @@ namespace EscapeRoomEngine.Portal.Runtime
 
         private void Awake()
         {
-            // check whether the collider is set up correctly
-            if (!GetComponent<Collider>().isTrigger) throw new Exception("Collider must be a trigger.");
-            
             DoorEvent += (_, type) =>
             {
                 if (type == DoorEventType.Connected)